Question about 1999 Chevrolet Blazer

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My1999 blazer is roaring? Does n e 1 no what it could b? Could it b my transfer case? Can i diconnect my front wheel drive? Till i can replace it?

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  • 57 Answers

Its a Lion under your drivers seat....
wish posters would explain things a bit clearer

Posted on Nov 06, 2014

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Posted on Jan 02, 2017

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SOURCE: hummer h2 transfer case

Only way for this to happen on an H2 (AWD) is for something to break rearward of the lockup hub. Take a look at the splines between the intermediate shaft and centerdifferential or even the teeth on the forward sun gear and/or stepped pinion on the center diff.

As long as you have the t-case torn down for repair be sure to upgrade to the new aluminum mode fork (production upgrade to old plastic forks thru end of 2007 or so). You should also upgrade the rear half of the housing to the 2008 version which has a pressed-in rear prop bushing (better bushing and is also replaceable.

Posted on Sep 30, 2008

  • 9 Answers

SOURCE: 4 wheel drive on 1999 chevy blazer

99 chev blazer should have an electric motor not a vac switch...Is your controll on the dash a switch you turn.. or on the floor you shift ??

Posted on Jan 07, 2009

  • 1 Answer

SOURCE: 4 wheel drive not working

when you engage it in 4 wheel make sure you are getting vacuum to the acuator just pull the hose off and feel to see if there is vacuum if not check all vacuum hoses

Posted on Jan 25, 2009

  • 6982 Answers

SOURCE: 99 Silverado 4-wheel drive not engaging

It does not seem that sufficient diagnosis was done. No, you cant give a specific diagnosis like that without tearing unit down. It's likely that they told you the most common failure and left it at that. Likely there is a problem with your unit...I think this becomes more of a trust issue than a mechanical one. A second opinion from an independent reputable shop may help but either way, you need to have it fixed. In not using it much, it makes me wonder how it got worn.
good luck

Posted on Mar 19, 2009

  • 17 Answers

SOURCE: stuck in 4 wheel drive and wont come out.

hey there i cant tell you what you are missing but i can tell you how to disengage the front wheels . ok you have a vacum line that runs right under the battery and a line that comes up from the front diff. to the same place ( you may have to remove batt and batt tray to get full access to this) un bolt it and temporaly put batt and batt tray back in start it up and decompress this and see if it comes out .... you should here clunking noise if it goes back in ... if thats the case just pull that big vaccum line off .... to test get all four tires off the ground and have some one put it in drive but dont hit the gas it should turn on its own ...if that dont work check the cable that runs down to the differental

Posted on Aug 06, 2009

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Changed to 4wheel drive low and I can't get it to change back to 2 wheel drive.


1999 Blazer. Thing's to check. 4x4 problem. There's an actuator pump under your battery plate. Make sure its in good shape and its working proper. Next check the cable that runs from the pump to the front transfer case. Then check the actuator switch on the front transfer case. Then check the vacuum lines from the front transfer case to the rear transfer case, that should be right under the drivers side door. There's also a actuator switch on the rear transfer case witch two vacuum lines run out of. Check them also, and last check your fluid level in your transfer case. Start from the beginning to the end. Don't forget to use your 4x4 every know and then to keep it up to power. Its not like the good old days. Where a pull of the lever on the floor engaged the 4x4. I hope this helps.

Apr 09, 2014 | 1999 Chevrolet Blazer

1 Answer

My four wheel drive is not working. i replaced the switch on the dash. tried it and all it did when i hit 4-hi both 4-hi and 4-lo blink a few times the it goes back to 2 wheel drive. it did stay in 4-hi...


It's the transfer case motor.I had the same problem exactly and replaced, now it works great. Part is about $100.00 ( aftermarket ) .Ifyou are going to replace yourself you will have to remove front drive shaft and remove yoke from transfer case with an impact wrench for clearance to remove transfer case motor . When you put the new transfer case motor in make sure you line up slot with grove in transfer case motor. Good Luck.

Jan 03, 2011 | 1997 Chevrolet Blazer

1 Answer

4 wheel grinding of and on up front. drive shaft is turning from transfer case but front wheels do not.


It could be a loose vacume hose. Check all of your vacume hoses. It could also mean your transfer case needs replaced.

Dec 17, 2009 | 1996 Chevrolet Blazer

3 Answers

4 wheel drive not working


when you engage it in 4 wheel make sure you are getting vacuum to the acuator just pull the hose off and feel to see if there is vacuum if not check all vacuum hoses

Jan 14, 2009 | 1996 Chevrolet Blazer

1 Answer

4 wheel drive not working


Vacume lines or vacume switch on transfer case,or vacume pod to front axle.

Jan 05, 2009 | 1993 Chevrolet S-10 Blazer

4 Answers

What transmission interchanges with a 98 4z`x4 Blazer


sorry but your stuck with the 4l60e if you want it to be right. as for using the bravada transmission thats fine you just have to use your transfer case. your transfer case uses a switch on the dash and an electric motor on the transfer case. the bravada uses a series of sensors on the front and rear axle that sense wheel slippage and send a signal to the electric motor on the transfer case causing it to lock in four wheel drive. when the sensors dont sense wheel slippage any more the system returns to two wheel drive. that,s why they call it smart track. just unbolt your transfer case from your transmission and bolt it to the bravada transmission and install it. p.s- dont forget to at least change the front pump converter seal. for 4 or 5 bucks it,s cheap insurance against a major leak and i dont think you want to pull that transmission out again and yes i saw that happen to many times. good luck.-G.J.M

Jan 04, 2009 | 1998 Chevrolet Blazer

1 Answer

Will not switch between four wheel drive and two wheel drive.


DID YOU CHECK THE MOTOR IN THE FRONT AXLE AS WELL AS THE ONE IN THE TRANSFER CASE GOOD LUCK

Dec 31, 2008 | 1994 Chevrolet S-10 Blazer

4 Answers

2001 Chevy Blazer 4 wheel drive


The four wheel drive systems in these vehicles are simple. The push button controls the four wheel drive computer. The computer tells the encoder motor (on transfer case) to shift. When the transfer case shifts there is a vaccum switch on the transfer that is activated which sends vaccum to the accuator under the battery. The accuator pulls a cable to lock the front axle in. This covers all s series trucks and suv's with push button four wheel drive but not with auto or all wheel. Now to answer some questions. If your push button is lit up but will not go in to four high you should try to reset the four wheel drive computer. To reset pull the courtesy light and atc fuses for sixty seconds install fuses then cycle key on and off 5 times. If your transfer case shifts but your front end does not lock in check for vaccum at the switch on the transfer case in and out. If no vaccum out replace switch motormite number 49315 at parts store. If you have vaccum out check accuator.

Jun 02, 2008 | 2001 Chevrolet Blazer

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